- When queue is created with throttle hint low it should be power conservative
- With this change whenever queues with low throttle setting requests wait
for GPU completion, such wait will be handled in power conservative manner.
- Whenever GPU is not completed, waiting thread will be put to sleep and will
for GPU completion that triggers the wake up interrupt.
Change-Id: I9f34872a38ab9f5952f9d9623ea43503fc3dd587